[Johnson] 866 / Solid state rectifiers

Thu, 21 Feb 2002 18:52:43 -0500

At 05:33 PM 2/21/02 -0800, Jerry Kincade wrote:
>I've run 1N2637's in my Valiant for about three years now with only one
>problem: When the lights in the shack are turned down, I don't get that nice
>purple glow from the cabinet when I key up, and I kind of miss that.

Ok..  I have some of those solly state things, and here is what I suggest:

Make up a nice little "power supply" that has a pair if 866's in it: plate 
supply of about 24 volts ac and a load of maybe 200 ma.  Then arrange to 
key the "load" with a signal tapped from the antenna coax.  Maybe a 6080 
that's biased off until the signal comes along.. make the whole thing look 
real nice.

Then when you key the transmitter, you can watch the flickering glow..It'll 
work on AM, too with the biases set just right.  No danger. Lots of purple 
glow. You could even put it under a glass dome like the Moth high end audio 
amplifier.

Holy Ionization, Batman, that's COOL!

Roy
Who wants HIS Valiant to last and last and last...

>Can't
>have everything, I guess. The 1N2637's appear to be pretty bulletproof, and
>I only experienced about a 5V increase in the HV when I put them in. I think
>it's a very worthwhile swap, so I'm with Cal, I'd recommend 1N2637's vice
>going to another tube.
>73, Jerry W5KP
>
>----- Original Message -----
>From: "Cal Eustaquio" <[email protected]>
>To: <[email protected]>; <[email protected]>
>Sent: Thursday, February 21, 2002 1:09 PM
>Subject: Re: [Johnson] 866 / Solid state rectifiers
>
>
> > Hi:
> > I tend to disagree with the 3B28's substitution. I know many who will
> > disagree on this but that's fine. This is what this forum is all
> > about.
> >
> > There have been some problems associated with the gas tubes (866's).
> > I understand that. I also have seen the 5v tap burnt out on some of
> > these Valiants or had reports of this happening. Subsequently, I
> > changed out the 3B28's on a Valiant II with the s/s 866's. Quite
> > frankly, the change from tube to s/s diode makes sense. You unload
> > the power transformer of 5 volts times whatever current it takes to
> > run two 3B28's on that filament not to mention that h.v. path the
> > 3B28 is running. This is not to say many have run the 3B28's without
> > fail for many years and get irritated with my assertion. Bottom line
> > is: YMMV. I just chose the "preemptive strike" approach to prevent a
> > failure my xfmr.
> >
> > IMHO
> > Cal, N6KYR.
> >
> > ---- Original Message ----
> > From: [email protected]
> > To: [email protected]
> > Subject: Re: [Johnson] 866 / Solid state rectifiers
> > Date: Thu, 21 Feb 2002 11:40:13 -0800
> >
> > >What is a 3B28 and where do you buy them?
> > >
> > >Bob Luce W9EFK
> > >-----Original Message-----
> > >From: anthony deprato <[email protected]>
> > >To: [email protected] <[email protected]>
> > >Date: Thursday, February 21, 2002 9:34 AM
> > >Subject: Re: [Johnson] 866 / Solid state rectifiers
> > >
> > >
> > >>thr 3b28's they work just as well and no warm up time
> > >>have them in both my Valiant and Thunderbolt
> > >>73 tony
> > >>
> > >>At 04:31 PM 2/20/2002 -0600, you wrote:
> > >>>Does someone make solid-state, plug-in replacements for the 866's
> > >in my
> > >>>Valiant? Tks.
> > >>>
> > >>>73 de Mike, N9BOR
> > >>>FISTS MAC SMC ZUT
> > >>>http://www.qsl.net/n9bor
> > >>>MAC http://www.qsl.net/mac
> > >>>
> > >>>di dah dit - The only Roger Beep you'll ever need.
> > >>>My designated driver is a 12BY7A.
> > >>>
> > >>>
> > >>>_______________________________________________
> > >>>Johnson mailing list
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> > >>
> > >>ANTHONY W. (Tony) DePrato WA4JQS
> > >>CALLS HELD:
> > >>WA4JQS/ZS1, WA4JQS/KC4, WA4JQS/4K1
> > >>ZD8JQS, V31SS,
> > >>VP8BZL, VP8SSI, 3Y0PI
> > >>
> > >>_______________________________________________
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- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
7130 Panorama Drive, Derwood MD 20855
Home: 301-330-8828 Work: Voice: 301-975-3254,  Fax: 301-948-6213
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